Steam-boiler furnace.



W. J. ELLIS.

STEAM BOILER FURNACE.

APPLICATION FILED MAY 6, 1909.

950,662. Patented Mar. 1, 1910.

2 SHEETBSHBET 1.

W. J. ELLIS.

STEAM BOILER FURNACE.

APPLICATION FILED mm, 1909.

950,662, Patented Mar. 1,1910.

2 SHEETS-SHEET 2.

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WILLIAM JEFFERSON ELLIS,

0F ANDREWS, NORTH CAROLINA.

STEAlVLBOILER FURNACE.

Specification 01 Letters Patent.

Patented Mar. 1, 1910.

Application filed May 6, 1909. Serial No, 494,301.

To all whom it may concern:

Be it known that I, W'ILLIAM JEFFERSON ELLIS, a citizen of the UnitedStates, residing at Andrews, in the county of Cherokee and State ofNorth Carolina, have invented certain new and useful Improvements inSteam-Boiler Furnaces; and I do declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to improvements in steam boiler furnaces.

One object of the invention is to provide a furnace and supplementalboiler adapted to be attached to steam boilers already in stalled or inuse to take the place of the old furnace and to increase the capacity ofthe boiler, and at the same time reducing the consumption of the fueland decreasing the labor required for running or attending to thefurnace.

Another object is to provide a furnace and supplemental boiler adaptedto be attached to steam boilers already installed or in use to take theplace of the old furnace and which itself forms a support for the oldboiler.

'With the foregoing and other objects in view, the invention consists ofcertain novel features of construction, combination and arrangement ofparts, as will be more fully described and particularly pointed out inthe appended claims.

In the accompanying drawings, Figure 1 is a vertical longitudinalsectional view of the invention, showing the manner in which the same isattached to the furnace of an old boiler; Fig. 2 is a front end View ofthe same; Fig. 3 is a vertical cross sectional View, on the line 3-3 ofFig. 1; Fig. 1 is a vertical longitudinal sectional view of theinvention, showing the construction of the same when arranged to supportan old boiler; Fig. 5 is a vertical cross sectional view on the line 5-5of Fig. 4, looking in the direction of the arrow; Fig. 6 is a detailperspective view of a part of the fire brick lining of the fire box,showing the manner in which the sections of the lining are heldtogether; Fig. 7 is a detail perspective view of one of the sections ofthe fire brick lining for the combustion chamber of the fire box.

In the embodiment of the invention, I provide a fire box 1, which isformed of heavy sheet metal and is preferably U- shaped in cross sectionand is extended downwardly below the grate to form an ash pit 2. Thefire box is provided with a fire brick lining 3 which is preferablyconstructed in sections of suitable size and of a shape to conform tothe shape of the box. The sections of the fire brick lining 3 arepreferably held together in operative position by means of tubular rodsor pipes l which are inserted lengthwise therethrough, adjacent to theupper and lower edges of the sections. The tubular rods or pipes 4extend throughout the length of the the box and open through the ends ofthe same, as shown in the drawings, thus permitting a circulation of airthrough the same which prevents the warping and melting or burning outof the pipes. In the lower portion of the fire box, is arranged asuitable grate 5 and the fire box is supported by suitable legs orsupporting braces 6, of which there may be any desired number, and whichare preferably arranged as shown.

In Figs. 1, 2 and 3 of the drawings, the fire box 1 is shown as beingattached to the front end of the furnace 7 and supporting base of an oldsteam boiler and when thus connected up, the front or outer end of theold furnace and fire box is removed and the rear end of the fire box 1is suitably connected therewith. In Figs. 4: and 5 of the drawings, theinvention is shown as arranged to take the place of the old furnace andfire box and to form a support for the old boiler. In the latter form ofthe invention, the fire box 1 is extended rearwardly a sufiicientdistance to receive the old boiler 8 which is mounted in the upperportion of the rearwardly extended end of the fire box in any suitablemanner, and the rear end of the extended portion of the fire boxprojects beyond. the rear end of the boiler and. is closed by a suitablecover plate 9 whereby a space is provided to permit the smoke andproducts of combustion from the fire box to enter the tines at the rearend of the boiler and pass through the same to the smoke stack 10arranged at the front end of the boiler, as shown.

Arranged in the upper portion of the fire box 1 is a supplemental boiler11, said boiler being approximately inverted U shaped in cross sectionas shown in Fig. 3 and extends throughout the length of the fire box andhas its ends arranged in the opposite end plates 12 of the fire box. Theboiler 11 is of less diameter than the fire box thus providing a spacebetween boiler and the adjacent sides of the fire box, said space beingclosed at the top of the fire box by suitable doors 13 which arepreferably hinged to the top of the boiler, as shown, and are adapted tobe opened to permit the feeding of fuel to the fire box. In the front orouter wall or end plate 12 of the fire box and opening into the spacebetween the boiler and the adjacent side wall of the fire box, are aseries of stoke holes 14 through which a stolring tool may be inserted.The holes 14 are covered by suitable cover plates 15.

Arranged in the lower portion of the boiler and extending longitudinallythere through is a cylindrical combustion chamber 16 which opens throughthe bottom of the boiler and connects with the fire box along the entirelength of the same. The combustion chamber 16 is preferably formed ofsheet metal and is supported upon inwardly rojecting flanges 17 formedin the lower side of the boiler, as shown. The combustion chamber isheld in position and braced by a series of radially projecting bracerods 18 secured therein and in the adjacent sides of the boiler. Theouter end of the combustion chamber 16 opens through the end wall of theboiler and is closed by a suitable head 19. The inner or rear end of thecombustion chamber opens into the fire box 7 of the old boiler or intothe extension of the fire box 1 so that the products of combustion maypass therethrough and into said extension or old fire box and throughthe same to the return tubes of the boiler. The combustion chamber 16 ispreferably provided with a fire brick lining 20 whereby the walls of thesame are protected from the intense heat of the fire.

he supplemental boiler 11 is connected at its inner end to the forwardend of the old boiler by water conducting pipes or tubes 21, one ofwhich connects with each leg of the boiler, as shown in Fig. 5 of thedrawings. The upper portion of the boiler is provided, adjacent to itsfront and rear ends, with pipe connections or fittings 22, with one ofwhich is connected a steam conducting pipe 23, which connects at itsopposite end with the steam dome 24; of the old boiler. The pipe 23 maybe connected with either of the fittings 22 but is here shown and ispreferably connected with the fitting at the outer end of the boiler. Inthe upper portion of the boiler is also formed a man-hole 25 which isthe sides of the,

closed by a suitable cover. In the outerend of the boiler, adjacent tothe lower ends of the boiler legs, are blow-out or mud valves 26. Thefront end of the fire box and the ash pit are provided with the usualclean-out doors 27 and 28. a

The lining 20 of the combustion chamber is preferably constructed in theform of sections shaped to fit the chamber and said sections are eachprovided with a central longitudinally disposed slot or passage 29 andalong each edge are formed with longitudinally disposed notches 30which, when the sections are engaged to form the lining, provideadditional slots or passages which permit the flame or heat from thefire to pass through the lining. The sections of the lining are alsoprovided on their outer walls with longitudinally disposed spacing ribs31 which engage the inner wall of the combustion chamber and separatethe lining from the inner wall thereby providing a space through whichthe heat and flame entering the slots 29 and notches 30 passes betweenthe lining and the adjacent wall of the chamber, thus increasing theheating capacity of the same. The sections of the lining 20 may beprovided in their opposite ends with sockets 82 to receive connectingpins 83 whereby the sections may be more firmly secured together inoperative position to form the lining.

From the foregoing description, taken in connection with theaccompanying drawings, the construction and operation of the inventionwill be readily understood without requiring a more extendedexplanation.

Various changes in the form, proportion and the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any of the advantages of the invention, as defined in theappended claims.

Having thus described my invention, what 1 claim is:

1. The combination with a steam boiler having a furnace arrangedthereunder, of an auxiliary boiler arranged in front of said furnace andhaving a combustion chamber extending throughout its length and openingat one end into said furnace, a fire box substantially surrounding saidboiler and communicating with the combustion chamber throughout itslength, circulating pipes connecting said auxiliary boiler with theother boiler, and a pipe connecting the steam space of said auxiliaryboiler with the dome of the other boiler.

2. The combination of a fire box, a boiler arranged in said fire box, acombustion chamber extending longitudinally throughout the length ofsaid boiler and communicating throughout its length at its lower sidewith the fire box, a lining for said combustion chamber spaced slightlyfrom the walls my hand in presence of two subscribing thereof, andhaving openings therein to per- Witnesses.

mit the flame or heat from the fire to pass through the lining intocontact with the WILLIAM JEFFERSON ELLIS 5 walls of the chamber tofacilitate the gen- Wit eration of the steam in the boiler. E EDMONSTON,J

In testimony whereof I have hereunto set O. E. HUNT.

